• GBP/USD eyes 1.4915 after half-cent+ retreat from 1.4972
  
  
• EUR/USD losses influenced cross retreat from 1.4972
• Key resistance at 1.50 (1.4981 = Monday high; 1.4995 = Mar 26 high)
  
  
• 1.4915 was Tuesday's post-UK service PMI high, before drop to 1.4803
  
  
• Shell/BG M&A deal prime focus for GBP Wednesday